I was really loving CM they felt like TBC Heroics of old, and unlike the MoP CMs they gave rewards that weren't simply cosmetic. The best part is the people I met outside of my guild. Something that hasn't happened since TBC once again since the difficulty along with rewards made people come together and work together unlike just simply pressing join queue.
Already sadly though with HM out I'm not seeing nearly as many groups being formed as the ilvl is only 640 and HM drops 655. Meanwhile the HM LFR drops 640 gear at a more reliable rate. I like having things to do outside of raiding though that is fun, challenging and rewarding. If the CM gear is 650 then it could pose as a decent sidegrade for people doing Normal HM or even an upgrade if it's Warforged.